Machine for making envelopes and the like



July 30, 1935. A. POTDEVIN 2,009,857

MACHINE FOR MAK ING ENVELOPES ND THE LIKE Filed Sept. 30, 1932 IN V EN TOR.

BY 7 a Arromv s.

Patented July 30, 1935 I UNITED STATES PATENT OFFICE MACHINE FOR MAKING ENVELOPES AND THE LIKE Adolph Potdevin, Garden City, N. Y., assignor to Potdevin Machine Company, New York, N. Y., a corporation of New York Application September 30, 1932, Serial No. 635,494

7 Claims. (01. 93-18) This invention relates to an apparatus for mak- The gluing disc 4, which as above mentioned is ing envelopes, and has forone of its objects the adjustable circumferentially is set so that the provision of an apparatus for the making of ennotcher or die 8 will notch the edge of the web velopes in which the top of the envelope is prointermediate adjacent ends of the glue or advided with a projecting flap and in which in the hesive stripes 9.

making of the envelope means are employed for The web after being notched passes through notching the web from which the envelopes are tubing mechanism I2 where it is formed into a to be made, the notching mechanism being of tube having a longitudinal seam l3. The rollers such acharacter that to vary the envelope lengths 4 ar p y d to i su pr p din f t it is unnecessary to change the notching die, the envelope around the former shoe S. envelope lengths being altered merely by chang- In the tubing or folding over operation, the web ing the speed of the draw rollers. edges are folded toward each other into over- In the drawing accompanying this application: pp relation along t inner ends of the Fig. 1 IS a more or less diagrammatic plan view notches H, as will be seen from Fig. 1, so as to of an apparatus constructed in accordance with bring the no c ll into the upper Wall Seam my invention; wall of the tube as seen at IS in Fig. 1.

Fig. 2 is a side sectional elevation of the ap- The tube thus formed continues through forparatus of Fig. 1; warding or draw rollers l6, and from thence to Fig. 31s a section substantially on the line 3-3 cutting off or severing mechanism ll, holdback of Fig. 1; rollers I8 to another pair of forwarding rollers I9.

Fig. 4 shows the bag of the invention just be- The cutting off or severing mechanism l1 comfore the bottoming operation; and prises a knife 20 driven transversely to the travel Fig. 5 shows the finished bag. of the tube, moving downwardly with respect to Referring to the drawing in detail, the material the plane of the web as shown in Fig. 1 and 00- for the making of the envelopes is taken from :3. Operating With fixed blade The machine supply roll I, the web 2 from this roll passing is so timed that the cutting off or severing operabout the idler or guide roll 3 to and in contact ation takes place at a p Of the lower Well with circumferentially adjustable segmental glu- 0f the Web which immediately underlies the D ing disc 4, receiving its glue or other adhesive referred to above as l5, provided by the folded I from glue roll 5, the material still in web form over abutting notches II. This provides a flap 30 then passing about guide roller 6 and past notch- 2] 0n e trailing edge of the forward envelope ing mechanisms or notching dies at each side of leng and a p 22 On the leading d of e the web designated 1 and 8. adjacent bag length, the flap 2| as will be pointed The gluing disc 4 applies stripes of glue or other Ou hereinafter being at the p of the e pe adhesive 9 longitudinally of the web, the stripes in the finished article, the flap 2. at the bottom. being aligned but discontinuous by reason of the The envelope length with a flap projecting from break ID in the disc. The disc 4 being circumeach end of the lower wall thereof then goes into ferentially adjustable it will be apparent that the the bottoming mec a ed 23 Where stripes S'may be very accurately located. it receives a transverse stripe 24 of adhesive on The notchers or dies 1 and 8 move or are driven the upper surface of the upper wall and where 40 in a direction transverse to the direction of travel the flap 22 is folded over upon the upper wall of of the web 2, as indicated by the arrows on Fig. 1, the envelope length an 1111011 this adhesive Stripe their movement being about parallel axes and to finish the bag as shown in Fig. 5. these axes in turn being parallel to the travel of The bottoming mechanism is part of my 00- the web. The notches which are cut out of each pending application, Serial No. 635,495, filed Sepside of the web are designated II. This permits tember 30, 1932, and hence will not be described the web speed to be varied to vary the spacing of in detail herein.

the notches without varying the speed of the WhatI claim is:-

notchers. It is to be noted that each of the dies 1. In a machine for making envelopes and the T and 3 is slightly p d in plan and also is so like from a web of material, the combination of 5 set that t forward e is slightly lower t means for continuously advancing the web, and the t ilin d to p i of p n up or notching devices at each side of the advancing sl w down of the Web speed to y the 8 web adjacent the edges thereof for notching V p and yet insuring that the notches II will the web at predetermined intervals, each of said be clean cut. notching devices continuously rotating about axes parallel to the direction of travel of the web and having their leading edges slightly lower than their trailing edges.

2. In a machine for making envelopes and the like, the combination of a segmental disc for applying aligned stripes of adhesive to one face of a continuously traveling web adjacent one edge of said web, and means for notching opposed edges of the traveling web, the notching mechanism rotating continuously about axes parallel to the direction of travel of the web and being so timed as to notch one edge of the web in the space between adjacent ends of the said aligned adhesive stripes as the web is being continuously advanced.

3. In a machine for making envelopes and the like, the combination of a rotary striping device for applying aligned spaced stripes of adhesive along one face of a traveling web adjacent one edge thereof, means rotating about axes parallel to the direction of the web travel for notching opposed edges of the web, the notches in the striped edge of the web being positioned in the space between the adjacent ends of adjacent adhesive stripes, tubing mechanism for tubing the web and to bring opposed notches into juxtaposition in one wall of the tube, and severing mechanism rotated transversely of the web travel for severing the tube intermediate the sides of opposed notches.

4. In a machine for making envelopes and the like, the combination of means for continuously advancing a web of material, notching devices at each side of the advancing web adjacent the edges thereof for notching the web at predetermined intervals, each of said notching devices rotating about an axis parallel to the direction of travel of the web to permit of varying the speed of the web without varying the speed of said notchers thereby to vary the spacing of the notches in the web, means for tubing the web to bring opposed notches into juxtaposition, and severing means for severing the tube transversely intermediate the sides of opposed notches.

5. In a machine for making envelopes and the like, the combination of means for continuously advancing a web of material, notching devices at each side of the advancing web adjacent the edges thereof for notching the web at predetermined intervals, each of said notching devices rotating about an axis parallel to the direction of travel of the web to permit of varying the speed of the web without varying the speed of the notches, thereby to vary the spacing of the notches in the web, and means for tubing the web to bring opposed notches into juxtaposition.

6. In a machine for making envelopes and the like, the combination of means for continuously advancing a web of material, a striping device for applying aligned spaced stripes of adhesive along one face of the advancing web adjacent one edge thereof, notching devices at each side of the advancing web adjacent the edges thereof for notching the web between said stripes, each of said notching devices rotating about an axis parallel to the direction of travel of the web to permit of varying the'speed of the web without varying the speed of "said notchers, to vary the spacing of the notches in the web.

'7. In a machine for making envelopes and the like, the combination of means for continuously advancing a web of material, a circumferentially adjustable segmental disc for applying aligned stripes of adhesive along one face of the advancing web adjacent one edge thereof, notching devices at each side of the advancing web adjacent the edges thereof for notching the web between said stripes, each of said notching devices rotating about an axis parallel to the direction of travel of the web to permit of varying the speed of the web and the setting of said striping disc without varying the speed of said notchers, to vary the spacing of the notches in the web.

ADOLPH POTDEVIN. 

